Dispatch conveyer safety device



I 0d. 18, 1932. TQRNBERG 1,883,121

DISPATCH (LONVIEYER SAFETY DEVICE Original Filed March 27. 1928 2 Sheets-Sheet l a, Wyn-0,45

Patented Oct. 1 8, 1932 v [UNITED STATES PATENT OFFICE ISIDOR TORNBEBG, OF PLAINFIELD, NEVL JERSEY, ASSIGNOR TO WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA DISPATCH CONVEYE R SAFE'I'Y DEVICE Application filed March 27, 1928, Serial No. 265,121. Renewed May 4, 1932.

This invention relates to a device for preventing the choking of the web at the time it enters the fan delivery of a newspaper folding machine.

The principal objects of the invention are to provide a safety device for stopping the press in case such a choke occurs; to prevent the choke increasing and thus sometimes bending the fan blades and thus breaking down the entire delivery system; to provide means on the fan shaft adapted to move when the fan encounters any unusual strain and connections therefrom for operating a switch which will then out Oh the electric current to the press operating motor, thus stopping the machine, and to provide improvements in other features of construction as will appear.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is an end View partially diagrammatic of a folding machine and means for operating the dispatch conveyor to which this invention can be applied;

Fig. 2 is a central sectional view through the fan shaft, showing an embodiment of this invention;

Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 2;

Fig. 4 is a side view of the operating mechanism shown in Fig. 2, illustrating it in normal position; and

Fig. 5 is a similar view showing its action when the fan encounters undue resistance.

Most printing presses are equipped with what is known as dispatch conveyers. These are employed for the purpose of carrying the printed and folded papers from the press to a point more or less distantly removed where they are bundled for distributing purposes. These dispatch conveyers have been known to choke up and break the driving means, usually a chain, which connects its driving mechanism to some part of the folder, usually the fan shaft. When the above mentioned chain breaks, the entire delivery mechanism stops while the press continues to deliver papers on the now stationary belts beneath the fan. This causes a choke to take place at that point which may result in the bending of thefans and generally in breaking down the entire delivery system.

The invention. is shown as applied to a folder comprising a folding couple and folding rollers fan 11, paper guide 12, delivery belts 18 and a dispatchconveyer 14. The dispatch conveyer is shown as being driven as usualby a chain from the fan shaft 16.

For the purpose of stopping the press when the fan encounters any unusual resistance, the fan shaft 16 is'provided with a sprocket 17 on whichv the chain 15 runs, mounted on a hub 18.. This hub is free to rotate on the shaft. It is backed. up by a collar 19 fixed to the shaft 16 at one side and by a springseated collar 20 on the other side. This collar 20 has a spline 21 adapted to slide in a groove 22 with which. the shaft 16 is provided. This collar is held against the hub 18 by a spring 23, which is held in adjusted position by a collar 24 fixed in adjusted position on the shaft 16.

The collar 20 has connected with it by screws a radial detachable lug 25 which has slanting or curved surfaces, being shown substantially semi-cylindrical. Under normal running conditions thislug rests in a radial cutout or groove 26 on the edge of the hub 18, the lug and the groove being arranged to fit each other. The lug is pressed into the groove by the spring 23.

When any unusual strain comes on the driving mechanism, the spring 23 yields sufficiently to allow the lug to cam itself out of the groove as'shown in Fig. 5. This does not stop the rotation because the lug 25 is on a piece integral with the splin 21 and the edge of a cutout 27 in the hub 18 engages the spline 21 anyway. Therefore the drive between the shaft and sprocket is never disconnected, though the unusual strain moves the collar 20 along the shaft.

In a convenient place on the frame is an electric switch 30 having an operating lever 31 on which is a roll 32 located in such position that when the collar 20 moves back,'it engages this roll and swings the lever so as eto break ithe "current at the switch. This switch is inlseries with electric line foridrivsition shown in Fig. 1, and starting the motor.

Although I have illustrated and described only one form of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the inveneratively connecting the conveyer with the fan shaft in all positions of said sliding means, of means whereby when the fan encounters an abnormal resistance, the convever will be stopped.

11 testimony whereof I have hereunto affixed my signature.

ISIDOR TORNBERG.

tion as expressed in the claims. Therefore, I

do not wish to be limited in these respects, but what I do claim is 1. In a folding machine, the combination with a fan and its shaft and means for driving the shaft, of a driving wheel rotatably mounted on the shaft, a collar slidably keyed to the shaft and having means for driving the said wheel, said collar being yieldingly mounted to move longitudinally on the shaft, means whereby, when the wheel encounters undue resistance, the collar will be moved back along the shaft, and means in the path of the collar for disconnecting the shaft from its driving means when the collar is moved back.

2. In a folder, the combination with a fan, a fan shaft and .a motor for driving the shaft, of a sprocket Wheel for driving purposes rotatably located on the shaft, a collar to which the sprocket wheel is connected permanently but slidingly keyed to the shaft, the collar having a projection, a hub on the wheel having a recess for receiving the proj ection for transmitting rotation of the shaft to the driving wheel, whereby, when the fan encounters undue resistance, the collar and hub will have a slight relative rotary m0- tion and the projection will move out of the recess, thereby moving the collar back, and a switch in the path of the collar for shutlgin off the current when the collar is moved 3. In a folder, the combination with a fan and its shaft, of 'an electric circuit, a switch in the circuit, a collar rotatably and slidably mounted on said shaft and having means for turning the shaft in all positions of the collar, a motor connected with the circuit for driving the folder and collar, and means on the collar for opening theswitch when the fan encounters undue resistance, thereby stopping the folder.

4. In a folder, the combination with a fan shaft, a dispatch conveyer and means slidably mounted on said fan shaft for op- Lil 

